After hitting her head particularly hard one day, Duke Claes' daughter, Katarina, suddenly recalls all the memories of her past life: that of a teenage Japanese girl. It seems in her past life, Katarina was playing a video game very similar to the life she lives now right before she died. She is now Katarina Claes, the antagonist of the otome game, who nastily hounded the protagonist until the end. Knowing all the possible outcomes of the game, she realizes that every single possible route ends with Katarina being murdered or exiled. In order to avoid these Catastrophic Bad Ends, she has to use her knowledge of the game and her own wiles, starting with breaking off this engagement with the prince. (from manga)

Rikuo has graduated from college, but has zero ambition or direction and works in a convenience store. A strange high-school dropout, Haru, keeps coming around with her pet crow. Rikuo still has a crush on his senior Shinako, who is beginning a teaching career, and who shows up in the store one day. Rikuo's relationships with the girls, and his feelings about his life, keep changing as the story evolves, bringing in other important characters—Rikuo's co-worker, the coworker's sister, and a childhood friend of Shinako's, etc. (from manga)

Taichi is in fifth grade and preparing for a summer camping trip when a large-scale network malfunction occurs. Taichi's mother and his younger sister Hikari get stuck on a train that won't stop moving, and Taichi heads to Shibuya in order to help them. However, on his way there, he encounters a strange phenomenon that sweeps him up into the Digital World along with the other DigiDestined.

First-year middle school girls Mirai Momoyama and Emo Moegi are two aspiring idols who decide to use the "Pri☆Chan System," a system used by famous people and companies to broadcast content. Like many girls starting their own channels and uploading content, the pair decide to become their own producers, starting their own channel in an attempt to become Pri☆Chan idols.

A middle school girl named Yume sees something fall from the sky, and meets a pale violet-colored kitten named Mew. It turns out that Mew has the power of "Yume Synchro" (Dream Synchro), the power to enter dreams. In the dream world, the girl and Mew collect Dream Stones.

Shūichi Kagaya is an intelligent and friendly high school student satisfied with his normal everyday life, which is why he is very careful to protect his secret: that he can transform into a terribly cute monster. But one day he uses his powers and risks discovery to save a girl. (from manga)